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68291200 = 275221341
BaseRepresentation
bin1000001001000…
…00101010000000
311202111112220201
410010200222000
5114440304300
610435414544
71456315465
oct404405200
9152445821
1068291200
113560420a
121aa54454
13111c0ac3
1490d966c
155ede66a
hex4120a80

68291200 has 48 divisors (see below), whose sum is σ = 168708510. Its totient is φ = 27315200.

The previous prime is 68291191. The next prime is 68291207. The reversal of 68291200 is 219286.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 66194496 + 2096704 = 8136^2 + 1448^2 .

It is not an unprimeable number, because it can be changed into a prime (68291207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7471 + ... + 13870.

Almost surely, 268291200 is an apocalyptic number.

It is an amenable number.

68291200 is an abundant number, since it is smaller than the sum of its proper divisors (100417310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68291200 is a wasteful number, since it uses less digits than its factorization.

68291200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21365 (or 21348 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 68291200 is about 8263.8489821632. The cubic root of 68291200 is about 408.7473167377.

The spelling of 68291200 in words is "sixty-eight million, two hundred ninety-one thousand, two hundred".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 128 160 200 320 400 640 800 1600 3200 21341 42682 85364 106705 170728 213410 341456 426820 533525 682912 853640 1067050 1365824 1707280 2134100 2731648 3414560 4268200 6829120 8536400 13658240 17072800 34145600 68291200